| Catalyst | Surface content of Au | |
| Au0 (%) | Au = (%) | |
| Au/Mg(OH)2-CeO2 (6.5%) | 41.54 | 58.46 |
| Au/Mg(OH)2-CeO2 (20%) | 59.40 | 40.60 |
| Au/Mg(OH)2-CeO2 (37.5%) | 65.60 | 34.40 |
| Au/Mg(OH)2-CeO2 (50%) | 72.37 | 27.63 |
| Au/Mg(OH)2 | 72.38 | 27.62 |